1448
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2730
- Proper Divisor Sum (Aliquot Sum)
- 1282
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 720
- Möbius Function
- 0
- Radical
- 362
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 21
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of hexagonal polyominoes (or hexagonal polyforms, or planar polyhexes) with n cells.at n=7A000228
- Conjecturally largest even integer which is an unordered sum of two primes in exactly n ways.at n=20A000954
- Smallest k such that the product of q/(q-1) over the primes from prime(n) to prime(n+k-1) is greater than 2.at n=26A001276
- a(n) = ceiling(1000*log_10(n)).at n=27A004227
- Simple triangulations of a disk: column 4 of square array in A210664.at n=5A004305
- Coordination sequence T2 for Zeolite Code BIK.at n=23A008048
- Coordination sequence T3 for Zeolite Code HEU.at n=25A008118
- Expansion of (1+x^4)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=44A008765
- Coordination sequence T2 for Zeolite Code VET.at n=23A009903
- Coordination sequence T3 for Zeolite Code VET.at n=23A009904
- Coordination sequence for CaF2(2), Ca position.at n=17A009926
- Erroneous version of A000228.at n=7A014558
- Numbers n such that phi(n) * sigma(n) + 4 is a perfect square.at n=32A015727
- Powers of sqrt(2) rounded down.at n=21A017910
- Powers of sqrt(2) rounded to nearest integer.at n=21A017911
- Powers of sqrt(8) rounded down.at n=7A017928
- Powers of sqrt(8) rounded to nearest integer.at n=7A017929
- Powers of fourth root of 2 rounded down.at n=42A018048
- Powers of fourth root of 2 rounded to nearest integer.at n=42A018049
- Powers of fourth root of 8 rounded down.at n=14A018066